Top X and Match Quizzes are games. They are created by staff members and are played by end-users. They are both nearly impossible to win, so they make great activation tools. You can announce big prizes (say 100k EUR for Top X) and have consolation prizes each week for the top performers. Both games come with their own point system and mechanics for determining the winners (configurable, of course). Also, noteworthy, these are the feature names and you can call them whatever you want (e.g. Betano's Great 7 or Samsung's Chelsea challenge).
Predictions on the other hand are not created by staff members. Every user can place a prediction on a number of individual markets on a particular match (depending on the data coverage different markets are available). They can do this via widgets placed on different pages (up to you, including articles). Correct predictions earn the user points, which are used for tiers, badges, success rate, etc. This is what you referred to as Predictor.
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